Device foe raising and lowering harvesters



(No Model.) 2 Sheets-Sheet 1.

O..A. A. RAND. DEVICE FOR RAISING ANDv LOWERING HARVESTERS. No. 461,249.

Patented Oct. 13, 1891.

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(No Model.)

z sheets-sheet 2. C. A. A. RAND. DEVICE FOR RAISING' AND LOWERINGHARVESTERS- No. 461,249. Patented Oct. 13,1891.

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UNITED STATES CHARLES A. A. RAND,

OF CHICAGO, ILLINOIS, ASSIGNOR-TO VILLIAM DEERING di COMPANY.

DEVICE FOR RAISING AND LOWERING HARVESTERS.

SPECIFICATION forming part of Letters Patent No. 461,249, datedOctober13, 1891.

u Application filed .T une 13, 1891. Serial No. 396,139. (No model.)

To @ZZ whom, t may @onor/rm A Be it known that l, CHARLES A. A. RAND, ofChicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Devices for Raising and LoweringHarvesters, of which the following v is a full description, referencebeing had to the accompanying drawings, in which- Figures l, 2, and 3are side elevations illustrating so much of a harvesting-machineembodying my improvement yas is necessary to make the principles of theinvention clear; In them the main vframe is shown in three of itspositions-highest, medium, and lowest. Fig. 4 is a plan view, part insection. Fig. 5 is a rear sectional view.

In the majority of self-binding harvesters now Aused the raising andlowering device consists of an axle provided with pinions at its ends,the latter adapted to roll in segments secured to the sills of theharvester. The resistance due to friction and to mud getting in thesegments makes it difficult to produce the desired adjustments. Forthese and other reasons I have dispensed with them and secured to theends of my axle arms that are pivoted to the main frame in such a waythat the axle may be swung up and down relative to `the frameand also byproper instrumentalities be guided.

A is the main driving-wheel; B, the front and rear platform-sills; C,the elevating devices, and, D the binder-table. Connecting the front andrear sills are the side sills E and F, properly secured to the former bybolting or riveting. Between these the main Wheel is placed.

a is the axle, to the stubble end of which is keyed the arm b, whichterminates in the wrist 1J', which in turn is free to move in an eye inThis block is adapted to slide freely fore and aft beneath the side sillF, and

is hooked thereon, as shown in Fig. 5, so that it may be held in properrelation relative to the side sill. Inv order that the pivot-piece b2may not move olf from the flange of the side sill a key b3 is provided.

c is a rod extending from an eye in the arm b forward to a pointnearthefront of the frame, where it is pivoted in a suitable casting c.

Now turning to the grain-side portion of the main frame a similarconstruction is found, d being thearm secured to the axle and having thepivot CZ in the guiding-block cl2 and connected to the forward part ofthe frame by the pivoted link e. From the hub of the arm d extendsanother arm f. To give proper strength to the latter it is connected bya brace portion f. To the lower end off is pivoted a nutfg, `into whichis threaded the shaft g, provided with a permanent or detachable crankg', guidedin the socket-form bea-ring g2. The arms b and l are pinned tothe axle, so that when the arm f is moved the axle and arms will beswung up and down. Hence the Whole device which connects the sill to themain frame may be controlled by the single armf.

It will be observed in Figs. 1,2, and 3 that the link e is pivoted tothe arm d at a point eccentric to the axle, and that as the axle israised and fallen the link is swung on the frontal pivot as an axis intovarious positions,

ter is also thrown over the main driving sprocket-wheel 7b2 of the mainsupportingwheel.

The proportions of the arms d and b rela-` tive to the length of thelinks c and e and the point of pivoting the said links to the armsI aresuch as to cause the actual movement of the axle relative to the frameto be in a true arc. The proportions shown in the drawings v areapproximately correct to give a movement such as to maintain thedriving-chain at a substantially uniform length.

In someharvesting-machines the axle is not supported at both ends. Mydevice is applicable to such, and my drawings may be considered asshowing a suitable construction. If the axle were cut off at the stubbleend of IOO the hub and the outer part dispensed with, it would be butnecessa'ry that the parts at the grain end of the axle be made strongerthan shown.

I have shown the screw-shaft extending rearward as the best means forrocking the aXle support or supports; but the latter may be rocked inany suitable manner and the screw-shaft I shall refer to in my claimssimply as one of the means .whereby the adj ustments may be effected.

I have shown the driven sprocket-wheel at the rear of the machine andthe links c and e pivoted at the front; but it may sometimes bedesirable to reverse the parts and have the driven sprocket-wheel at thefront of the machine. The principle, however, will not be changed norwill it be found necessary to change the proportions unless it isdesired to use a longer or shorter chain.

I have shown the location of the axes of the controlling-links in what Iconsider to be the best position; but I ind by experiment that they maybe varied very materially, and do not limit myself to the preciseposition shown, but shall consider any place of pivoting andproportioning which controls the movement an equivalent.

'What claim as my invention, and desire to secure by Letters Patent, is-

l. The main axle rigidly secured to one or more Varms jointed to movablepivotal pieces, the latter adapted to be guided in fore-andaft directionby the sills of the frame, the said arms controlled in a fore-and-aftposition by one or more links pivotally connected at a point forward ofthe axleand means for rocking the said arms on their pivots,substantially as described.

2. The combination, with the frame of the harvester, having the sidesills e and f, of the guiding pivotal blocks, the arm 0r arms on theaxle adapted to rock in and be guided thereby, a pivoted controllinglink or links,

the arm f, and screw adjustment therefor, substantially as described. vt

3. The main frame, the axle provided with the pivoted arm or arms, thelatter suitably guided and permitted to move fore and aft and controlledby the pivotal links, the arm f, and the screw-adjustment shaft g,pivotally secured to the main frame, all combined substantially asdescribed. p

Y CHARLES A. A. RAND; Witnesses:

J. F. STEWARD, ARTHUR JOHNSON.

